Gapmoose

Gapmoose
	Andreaea rupestris
Systematics
Department :	Moss (Bryophyta)
Subdivision :	Bryophytina
Class :	Andreaeopsida
Subclass :	Andreaeidae
Order :	Andreaeales
Family :	Gapmoose
Scientific name of the subclass
	Andreaeidae
	Engl.
Scientific name of the order
	Andreaeales
	Limpr.
Scientific name of the family
	Andreaeaceae
	Hedw.

The Andreaeaceae or Klaffmoose are a family of mosses . They form a separate subclass within the Andreaeopsida class .

features

The protonema of the klaffmoose are lobed to ribbon-shaped. It is attached to the substrate with single-row threads. The structure of the gametophyte is essentially similar to that of the Bryopsida . They are mostly small, blackish to reddish mosses. The leaves have no ribs, but they rarely have them.

The male gametangia ( antheridia ) stand on long stalks made up of two rows of cells and have three longitudinal grooves. As with the Sphagnopsida, it is opened without a cap.

The capsule of the sporophyte also has peculiarities: in Andreaea the capsule is not lifted up by a stalk ( seta ) but, as in the Sphagnopsida, by a pseudopodium, a structure of the gametophyte. The archespor vaults the columella. The capsule opens with four longitudinal cracks (rarely one or six); hence they have the name Klaffmoose. This way of opening is reminiscent of the liverwort .

Occurrence

The Andreaeaceae are rock-dwelling, acrocarpic , lime-shy mosses. They are distributed worldwide and are found mainly in mountains, as well as in arctic and antarctic regions.

Systematics

The Andreaeaceae are the only Andreaeopsida family , in addition to the Andreaeobryaceae, which are also a subclass of their own . The group is very isolated. The number of genres varies between one and four, depending on the author, a distinction is made here between three:

Andreaea is the largest genus with around 90 species worldwide, 10 of them in Europe.
Achroschisma wilsonii is a monotypic genus from New Zealand and South America
Bicosta fuegiana a monotypical genus from southern South America

literature

Jan-Peter Frahm , Wolfgang Frey : Moosflora (= UTB . 1250). 4th, revised and expanded edition. Ulmer, Stuttgart 2004, ISBN 3-8252-1250-5 .
Jan-Peter Frahm: Biology of Mosses. Spectrum Akademischer Verlag, Heidelberg et al. 2001, ISBN 3-8274-0164-X .

Individual evidence

↑ Wolfgang Frey, Michael Stech, Eberhard Fischer: Bryophytes and Seedless Vascular Plants (= Syllabus of Plant Families. 3). 13th edition. Borntraeger, Berlin et al. 2009, ISBN 978-3-443-01063-8 , pp. 138-139.

Web links

Commons : Klaffmoose (Andreaeaceae) - Collection of images, videos and audio files

University of Hamburg (Spanish)

[1] Wolfgang Frey, Michael Stech, Eberhard Fischer: Bryophytes and Seedless Vascular Plants (= Syllabus of Plant Families. 3). 13th edition. Borntraeger, Berlin et al. 2009, ISBN 978-3-443-01063-8 , pp. 138-139.